Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c8d85d079b11c67…

MALICIOUS

PDF

76.2 KB Created: 2021-05-19 13:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3630484c98ad02680e96b5499e983054 SHA-1: d9f91e5bf86f516ccdcc9dc8c6de13eb72a62f02 SHA-256: 6c8d85d079b11c67ea6eaf18e9a089e426ab4c0865ebca6c3ab3ee205d13c4d5
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xajibur.ru/strik?utm_term=mujhse+dosti+karoge+full+movie+sub+indo+youtube PDF link annotation
    • https://lorafapewokaxan.weebly.com/uploads/1/3/5/3/135342596/17f83cf8b6d88.pdfIn PDF document text
    • https://xijofufakeziti.weebly.com/uploads/1/3/1/3/131380729/11180.pdfIn PDF document text
    • https://sovezoku.weebly.com/uploads/1/3/4/7/134731827/petoxisusavopapejaza.pdfIn PDF document text
    • https://jebopisozezir.weebly.com/uploads/1/3/0/7/130739828/d0752a.pdfIn PDF document text
    • https://pebabole.weebly.com/uploads/1/3/4/6/134698512/9831366.pdfIn PDF document text
    • https://magojumenuta.weebly.com/uploads/1/3/4/3/134361537/galovewi.pdfIn PDF document text
    • https://sanofawuvi.weebly.com/uploads/1/3/4/5/134588151/5502e59c5f06d8.pdfIn PDF document text
    • https://nuwevalixur.weebly.com/uploads/1/3/5/9/135990129/werexibitiwiloj_buledivojug.pdfIn PDF document text
    • https://bageleripapim.weebly.com/uploads/1/3/4/4/134457575/latam_jufanikavowus_jafaf_jorodezuv.pdfIn PDF document text
    • https://lesavudipuvu.weebly.com/uploads/1/3/4/3/134338744/3833219.pdfIn PDF document text
    • https://femesavez.weebly.com/uploads/1/3/1/3/131383434/9038874.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/87dac931-6fa2-4bcb-81cb-8ae6452b3869/zokibalojevesumodob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a53706e-b1ce-46c8-aa71-26a9fad747ba/how_long_do_american_eagle_orders_take_to_ship.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/pioneer_deh-80prs_faceplate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52111230-5c98-44f8-a391-a57e3891a001/6011290245.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/charters_school_sixth_form_open_day.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/71515494460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd126070-36f8-4c40-8484-8da0801fa6b0/ap_biology_lab_report_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/84413205480.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/old_bollywood_movies_2008.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/87666066986.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51c776cf-5569-4c74-890d-6aced2594e65/rar_password_unlocker_mac_online.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/ropatefojuta.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC42 5768 bytes
SHA-256: a388e772a013d713f55a4821d976c0e9666912ca0c3e9d27d9502b9471fb66e6
font_01_sfnt_off0000ffda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDA 10392 bytes
SHA-256: 408533fefc6880426dde48faf86590e44c5d7cc55f43a488e1621792eda508a3

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